codewhisperer: isTestFile should use normalize filePath (#3766)

Author: Will-ShaoHua

.changes/next-release/Bug Fix-3d1f0437-68e9-47ce-b3e6-72f859c6d72f.json

@@ -0,0 +1,4 @@
+{
+	"type": "Bug Fix",
+	"description": "CodeWhisperer: Fix test file supplemental context not working as expected on OS not using '/' as file path separator"
+}

src/codewhisperer/util/supplementalContext/codeParsingUtil.ts

@@ -6,6 +6,7 @@
 import * as vscode from 'vscode'
 import path = require('path')
 import { DependencyGraph } from '../dependencyGraph/dependencyGraph'
+import { normalize } from '../../../shared/utilities/pathUtils'
 
 export interface utgLanguageConfig {
     extension: string
@@ -76,8 +77,12 @@ export async function isTestFile(
         fileContent?: string
     }
 ): Promise<boolean> {
-    const pathContainsTest = filePath.includes(`tests/`) || filePath.includes('test/') || filePath.includes('tst/')
-    const fileNameMatchTestPatterns = isTestFileByName(filePath, languageConfig.languageId)
+    const normalizedFilePath = normalize(filePath)
+    const pathContainsTest =
+        normalizedFilePath.includes('tests/') ||
+        normalizedFilePath.includes('test/') ||
+        normalizedFilePath.includes('tst/')
+    const fileNameMatchTestPatterns = isTestFileByName(normalizedFilePath, languageConfig.languageId)
 
     if (pathContainsTest || fileNameMatchTestPatterns) {
         return true